Revert "python 3.x support"
Revert "python 3.x support"

This reverts commit a2c2a7dc2536b582637980d966aea8af595494ae.

pklimai/py-junos-eznc,spidercensus/py-junos-eznc,spidercensus/py-junos-eznc,Juniper/py-junos-eznc,spidercensus/py-junos-eznc,pklimai/py-junos-eznc,Juniper/py-junos-eznc,Juniper/py-junos-eznc,pklimai/py-junos-eznc